Together, the existing and proposed LRT lines will connect Edmonton on all sides, establishing a public transit system other cities will be envious of   BY EMIL TIEDEMANN      Edmonton's LRT system began operating in April 1978. Construction began in 1974 and cost $65 million.   A S the city grows, so must our public transit system . That's just obvious. But even with that in mind, I'm still in awe of what City Council has in store for Edmonton when it comes to our low-floor, community-integrated LRT expansion plan .    The long-term LRT Network Plan was initiated by the city in June 2009, spearheaded by our new Mayor (and then City Councillor) Don Iveson . Since then we've seen five brand new stations on the LRT line: Health Sciences/ Jubilee , McKernan/ Belgravia , South Campus/ Fort Edmonton Park , Southgate , and  Century Park , all of which were completed by 2010.    In addition to those and the pre-existing 10 stations ( Clareview  to University ), there are three...